According to the multilevel model, the mean difference in numerical frequencies between two adjacent ordinal responses was 15.2 (Table 1), i.e., one OHIP point corresponded to approximately 15 problems occurrences.
In the multilevel model, however, the corresponding difference in birth weights between infants whose mothers sought adequate prenatal care and those whose mothers did not seek adequate prenatal care is only about 2121 grams.
The additional multilevel analysis showed a larger difference in costs (€6038; 95 % CI 4543 7533) between those experiencing AEs compared to those without AEs when the ICU costs were included.
Only for weight - not for length, weight-for-length or BMI - there was a significant difference in the multilevel linear growth model between the children of mothers with an elevated EPDS score and those of mothers with normal scores, with the latter having a higher weight.
A multilevel analysis investigated differences in achievement with experimental conditions as predictors on the class level and gender, language spoken at home, and pretest scores as predictors on the student level.
These authors used a multilevel logistic regression model to adjust for the difference in asthma severity at baseline and to account for any possible effect from clustering.
These differences could account for the large difference in the percentage of the subjects with skipped multilevel disc degeneration.
Using multilevel modelling (at the practice and individual level) to account for clustering, no significant difference in reconsulting was noted (odds ratio 0.75; 0.41 to 1.38).
The difference in proportion of 'private GPs' (21%) and 'contracted GPs' (35%) was not significant in the full multilevel model (p>0.05).
The possible difference in efficacy between the interventions will be carried out through an analysis based on the individual values of the patients using multilevel statistical techniques [ 32].
